Use starpu_data_wont_use if available

CMakeLists.txt

@@ -4,7 +4,7 @@
 #                          of Tennessee Research Foundation.
 #                          All rights reserved.
 # @copyright (c) 2012-2014 Inria. All rights reserved.
-# @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
+# @copyright (c) 2012-2015 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
 #
 ###
 #
@@ -563,6 +563,15 @@ if (MORSE_DISTRIB_DIR OR EXISTS "${CMAKE_SOURCE_DIR}/cmake_modules/")
                 list(APPEND CMAKE_REQUIRED_FLAGS "-L${libdir}")
             endforeach()
             string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+            set(CMAKE_REQUIRED_LIBRARIES "${STARPU_SHM_LIBRARIES}")
+            check_function_exists(starpu_data_idle_prefetch_on_node STARPU_IDLE_PREFETCH_FOUND)
+	    if ( STARPU_IDLE_PREFETCH_FOUND )
+                add_definitions(-DCHAMELEON_USE_STARPU_IDLE_PREFETCH)
+	    endif()
+            check_function_exists(starpu_data_wont_use STARPU_DATA_WONT_USE_FOUND)
+	    if ( STARPU_DATA_WONT_USE_FOUND )
+                add_definitions(-DCHAMELEON_USE_STARPU_DATA_WONT_USE)
+	    endif()
             if(CHAMELEON_USE_FXT)
                 # check if fxt profiling is accessible in starpu and activate it in chameleon
                 set(CMAKE_REQUIRED_LIBRARIES "${STARPU_SHM_LIBRARIES}")

runtime/starpu/codelets/codelet_dataflush.c

@@ -26,7 +26,8 @@
  **/
 #include "runtime/starpu/include/morse_starpu.h"
 
-#ifdef CHAMELEON_USE_STARPU_IDLE_PREFETCH
+#ifdef CHAMELEON_USE_STARPU_DATA_WONT_USE
+#elif defined CHAMELEON_USE_STARPU_IDLE_PREFETCH
 static void data_flush(void *handle)
 {
         starpu_data_idle_prefetch_on_node(handle, STARPU_MAIN_RAM, 1);
@@ -62,7 +63,9 @@ void MORSE_TASK_dataflush(MORSE_option_t *options,
             if ( A->myrank == A->get_rankof( A, Am, An ) )
             {
                 /* Push data to main memory when we have time to */
-#ifdef CHAMELEON_USE_STARPU_IDLE_PREFETCH
+#ifdef CHAMELEON_USE_STARPU_DATA_WONT_USE
+                starpu_data_wont_use(*ptrtile);
+#elif defined CHAMELEON_USE_STARPU_IDLE_PREFETCH
                 starpu_data_acquire_on_node_cb(*ptrtile, -1, STARPU_R, data_flush, *ptrtile);
 #else
                 starpu_data_acquire_cb(*ptrtile, STARPU_R, data_release, *ptrtile);